Dad, How Does It Work?

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Episode 9 · 10 min · Ages 5–10

Why Can't My Heart Ever Stop Beating?

Ages 5–10 | Why can't my heart ever stop beating? You're sitting still, doing nothing, but your heart keeps going. Thump. Thump. Thump.

You didn't tell it to move, so how does it keep working all on its own?

What is blood doing inside you all day?

Why does your heart beat faster when you run?

It turns out your heart and blood have a steady job they keep doing for you, every second of the day.

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Topic: Your Body · Published 15 February 2026

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